CVE-2026-2029Network attack vector

Contributor-level stored XSS via post-sanitization entity decoding

Published Feb 26, 2026 · Updated Feb 26, 2026

Stored XSS in Livemesh Addons for Beaver Builder 3.9.2 and earlier allows remote authenticated users to inject scripts via shortcode attributes. The labb_pricing_item shortcode sanitizes title and value with wp_kses_post(), then htmlspecialchars_decode() reactivates encoded markup. Contributor-level access is required; injected scripts execute in the browsers of users who open a page containing the malicious shortcode.

CVSS severity6.4
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Livemesh Addons for Beaver Builder 3.9.2 and earlier allows remote authenticated users to inject scripts via shortcode attributes. The labb_pricing_item shortcode sanitizes title and value with wp_kses_post(), then htmlspecialchars_decode() reactivates encoded markup. Contributor-level access is required; injected scripts execute in the browsers of users who open a page containing the malicious shortcode.

The record

CVE
CVE-2026-2029
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Livemesh Themes
Product
Livemesh Addons for Beaver Builder
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=3.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Livemesh Themes · Livemesh Addons for Beaver Builderversion=* <=3.9.2

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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